1279967728 has 40 divisors (see below), whose sum is σ = 2673172656. Its totient is φ = 590208000.

The previous prime is 1279967681. The next prime is 1279967749. The reversal of 1279967728 is 8277699721.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299688 + ... + 303928.

Almost surely, 2^1279967728 is an apocalyptic number.

It is an amenable number.

1279967728 is an abundant number, since it is smaller than the sum of its proper divisors (1393204928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1279967728 is a wasteful number, since it uses less digits than its factorization.

1279967728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5713 (or 5707 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 58.

The square root of 1279967728 is about 35776.6366222427. The cubic root of 1279967728 is about 1085.7579215941.

The spelling of 1279967728 in words is "one billion, two hundred seventy-nine million, nine hundred sixty-seven thousand, seven hundred twenty-eight".